Vulnerability identifier: #VU81667

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7653

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Eclipse Mosquitto
Server applications / Other server solutions

Vendor: Eclipse

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of not valid UTF-8 string. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Eclipse Mosquitto: 1.0 - 1.4.15

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External links
http://docs.oasis-open.org/mqtt/disallowed-chars/v1.0/disallowed-chars-v1.0.pdf
http://bugs.eclipse.org/bugs/show_bug.cgi?id=532113
http://lists.debian.org/debian-lts-announce/2018/09/msg00036.html
http://usn.ubuntu.com/4023-1/
http://www.debian.org/security/2018/dsa-4325

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.